private void AddCasesRomanNumbers()
 {
     RomanNumbersExtraCases = new RomanNumerals(
         new List <RomanNumeral>()
     {
         new RomanNumeral(4, "IV"),
         new RomanNumeral(9, "IX"),
         new RomanNumeral(40, "XL"),
         new RomanNumeral(90, "XC"),
         new RomanNumeral(400, "CD"),
         new RomanNumeral(900, "CM")
     }).GetEnumerator();
 }
 private void AddRomanNumbers()
 {
     romanNumbers = new RomanNumerals(
         new List <RomanNumeral>()
     {
         new RomanNumeral(1, "I"),
         new RomanNumeral(5, "V"),
         new RomanNumeral(10, "X"),
         new RomanNumeral(50, "L"),
         new RomanNumeral(100, "C"),
         new RomanNumeral(500, "D"),
         new RomanNumeral(1000, "M")
     }).GetEnumerator();
 }